Not the first time, won't be the last... Always go by the rules, not the summary
It is apparently from the mark up price you pay for a Cyberwolf (almost double the price) that you are paying for more than just the 1 attack increase and a slightly better save.
(16 pt Cyberwolf vs 8 pt Fenrisian )
And as Iron Priests are solo units, and only they can get them, I think its obvious the intend is that you buy cyberwolves for them, so they dont lose that t5 when with them alone (otherwise majority T4 kicks in). Plus GW has a history of 'cyber' giving you extra toughness.
I can understand if thats the way you want to go, there isnt much we can do, but it moves cyber wolves from being a decent choice, to just being utter crap.
I hope the digital book gets updates before lists are due, but I'll hold off on buying them for now then...
2013, Warhammer 40,000 Ultimate Champion
"I'm saying... I'm an insect who dreamt he was a man. But now the dream is over, and the insect is awake."
2012-13 Wargammer 40,000 General's & Standard League Champion